// script.aculo.us builder.js v1.9.0, Thu Dec 23 16:54:48 -0500 2010

// Copyright (c) 2005-2010 Thomas Fuchs (http://script.aculo.us,
// http://mir.aculo.us)
//
// script.aculo.us is freely distributable under the terms of an MIT-style
// license.
// For details, see the script.aculo.us web site: http://script.aculo.us/

var Builder = {
	NODEMAP : {
		AREA : 'map',
		CAPTION : 'table',
		COL : 'table',
		COLGROUP : 'table',
		LEGEND : 'fieldset',
		OPTGROUP : 'select',
		OPTION : 'select',
		PARAM : 'object',
		TBODY : 'table',
		TD : 'table',
		TFOOT : 'table',
		TH : 'table',
		THEAD : 'table',
		TR : 'table'
	},
	// note: For Firefox < 1.5, OPTION and OPTGROUP tags are currently broken,
	// due to a Firefox bug
	node : function(elementName) {
		elementName = elementName.toUpperCase();

		// try innerHTML approach
		var parentTag = this.NODEMAP[elementName] || 'div';
		var parentElement = document.createElement(parentTag);
		try { // prevent IE "feature": http://dev.rubyonrails.org/ticket/2707
			parentElement.innerHTML = "<" + elementName + "></" + elementName
					+ ">";
		} catch (e) {
		}
		var element = parentElement.firstChild || null;

		// see if browser added wrapping tags
		if (element && (element.tagName.toUpperCase() != elementName))
			element = element.getElementsByTagName(elementName)[0];

		// fallback to createElement approach
		if (!element)
			element = document.createElement(elementName);

		// abort if nothing could be created
		if (!element)
			return;

		// attributes (or text)
		if (arguments[1])
			if (this._isStringOrNumber(arguments[1])
					|| (arguments[1] instanceof Array) || arguments[1].tagName) {
				this._children(element, arguments[1]);
			} else {
				var attrs = this._attributes(arguments[1]);
				if (attrs.length) {
					try { // prevent IE "feature":
							// http://dev.rubyonrails.org/ticket/2707
						parentElement.innerHTML = "<" + elementName + " "
								+ attrs + "></" + elementName + ">";
					} catch (e) {
					}
					element = parentElement.firstChild || null;
					// workaround firefox 1.0.X bug
					if (!element) {
						element = document.createElement(elementName);
						for (attr in arguments[1])
							element[attr == 'class' ? 'className' : attr] = arguments[1][attr];
					}
					if (element.tagName.toUpperCase() != elementName)
						element = parentElement
								.getElementsByTagName(elementName)[0];
				}
			}

		// text, or array of children
		if (arguments[2])
			this._children(element, arguments[2]);

		return $(element);
	},
	_text : function(text) {
		return document.createTextNode(text);
	},

	ATTR_MAP : {
		'className' : 'class',
		'htmlFor' : 'for'
	},

	_attributes : function(attributes) {
		var attrs = [];
		for (attribute in attributes)
			attrs.push((attribute in this.ATTR_MAP
					? this.ATTR_MAP[attribute]
					: attribute)
					+ '="'
					+ attributes[attribute].toString().escapeHTML().gsub(/"/,
							'&quot;') + '"');
		return attrs.join(" ");
	},
	_children : function(element, children) {
		if (children.tagName) {
			element.appendChild(children);
			return;
		}
		if (typeof children == 'object') { // array can hold nodes and text
			children.flatten().each(function(e) {
						if (typeof e == 'object')
							element.appendChild(e);
						else if (Builder._isStringOrNumber(e))
							element.appendChild(Builder._text(e));
					});
		} else if (Builder._isStringOrNumber(children))
			element.appendChild(Builder._text(children));
	},
	_isStringOrNumber : function(param) {
		return (typeof param == 'string' || typeof param == 'number');
	},
	build : function(html) {
		var element = this.node('div');
		$(element).update(html.strip());
		return element.down();
	},
	dump : function(scope) {
		if (typeof scope != 'object' && typeof scope != 'function')
			scope = window; // global scope

		var tags = ("A ABBR ACRONYM ADDRESS APPLET AREA B BASE BASEFONT BDO BIG BLOCKQUOTE BODY "
				+ "BR BUTTON CAPTION CENTER CITE CODE COL COLGROUP DD DEL DFN DIR DIV DL DT EM FIELDSET "
				+ "FONT FORM FRAME FRAMESET H1 H2 H3 H4 H5 H6 HEAD HR HTML I IFRAME IMG INPUT INS ISINDEX "
				+ "KBD LABEL LEGEND LI LINK MAP MENU META NOFRAMES NOSCRIPT OBJECT OL OPTGROUP OPTION P "
				+ "PARAM PRE Q S SAMP SCRIPT SELECT SMALL SPAN STRIKE STRONG STYLE SUB SUP TABLE TBODY TD " + "TEXTAREA TFOOT TH THEAD TITLE TR TT U UL VAR")
				.split(/\s+/);

		tags.each(function(tag) {
			scope[tag] = function() {
				return Builder.node.apply(Builder, [tag].concat($A(arguments)));
			};
		});
	}
};